package com.webserver.core;

import com.webserver.http.HttpRequest;

import java.io.*;
import java.net.Socket;

/**
 * 处理与指定客户端的一次HTTP交互
 * 完成一次交互有三部分构成:
 * 1:解析请求
 * 2:处理请求
 * 3:响应客户端
 */
public class ClientHandler implements Runnable{
    private Socket socket;
    public ClientHandler (Socket socket){
        this.socket=socket;
    }
    public void run(){
        try {
            //1解析请求
            HttpRequest request=new HttpRequest(socket);

            //2处理请求
            String path=request.getUri();
            File file= new File("./webapps"+path);
            //3发送响应
            //            HTTP/1.1 200 OK(CRLF)
//            Content-Type: text/html(CRLF)
//            Content-Length: 2546(CRLF)(CRLF)
//                    1011101010101010101......
            OutputStream out=socket.getOutputStream();
            //3.1发送状态行
            String line="HTTP/1.1 200 OK";
            byte[]data=line.getBytes("ISO8859-1");
            out.write(data);
            out.write(13);
            out.write(10);

            //3.2发送响应头
            line="Content-Type: text/html";
            data=line.getBytes("ISO8859-1");
            out.write(data);
            out.write(13);
            out.write(10);

            line="Content-Length: "+file.length();
            data=line.getBytes("ISO8859-1");
            out.write(data);
            out.write(13);
            out.write(10);
            out.write(13);
            out.write(10);

            //3.3发送消息正文
            FileInputStream fis=new FileInputStream(file);
            data=new byte[1024*10];
            int len;
            while ((len=fis.read(data))!=-1){
                out.write(data,0,len);
            }
            System.out.println("响应发送结束");


            /*
            上述内容写好后,打开浏览器输入网址:http://localhost:8088:index.html
            测试读取浏览器发送过来的请求内容在控制台上确定内容
             */
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            //一次HTTP交互后要好于客户端断开连接(HTTP协议要求)
            try {
                socket.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }


}
